<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>
        {% block title %}
        {% endblock title %}
    </title>
    <link rel="stylesheet" href="{{ url_for('static',filename='bootstrap/bootstrap@4.6.1.min.css') }}">
    {% block header %}
    {% endblock header %}
</head>

<link style="background-image:https://tva3.sinaimg.cn/large/0072Vf1pgy1foxkifyvznj31hc0u0e1h.jpg;">

<body background="https://tva3.sinaimg.cn/large/0072Vf1pgy1foxkifyvznj31hc0u0e1h.jpg">
    <div class="container">
        <nav class="navbar navbar-expand-lg navbar-light bg-light" style="opacity:0.9;">
            <a class="navbar-brand" href="#">Flask</a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent"
                aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarSupportedContent">
                <ul class="navbar-nav mr-auto">
                    <li class="nav-item active">
                        <a class="nav-link" href="/">首页 <span class="sr-only">(current)</span></a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="{{ url_for('qa.public_question') }}">发布问答</a>
                    </li>
                    <li>
                        <form class="form-inline my-2 my-lg-0 ml-2">
                            <input class="form-control mr-sm-2" type="search" placeholder="关键字" aria-label="Search">
                            <button class="btn btn-outline-success my-2 my-sm-0" type="submit">搜索</button>
                        </form>
                    </li>
                </ul>
            </div>
            <div class="pull-right" id="navbarSupportedContent">
                <ul class="navbar-nav mr-auto">
                    {% if user %}
                    <li class="nav-item">
                        <a class="nav-link" href="#">{{ user.username }}</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="{{ url_for('user.logout') }}">退出</a>
                    </li>
                    {% else %}
                    <li class="nav-item">
                        <a class="nav-link" href="{{ url_for('user.login') }}">登录</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="{{ url_for('user.register') }}">注册</a>
                    </li>
                    {% endif %}




                </ul>
            </div>
        </nav>
        <!-- Content here -->
        <div class="container">
            {% block body %}

            {% endblock body %}
        </div>
    </div>
</body>

</html>